Remove vestigate HUDSON_PUBLISH_DOCS reference

This isn't actually used and is a leftover from a thing we did
seven years ago that survives today through copy-pasta.

Change-Id: Ic77d867ee1afaf4586a9fcbab5c36166e38604b6

doc/source/conf.py

@@ -39,10 +39,7 @@ exec(open(os.path.join("ext", "gen_ref.py")).read())
 extensions = ['sphinx.ext.autodoc', 'openstackdocstheme']
 
 # Add any paths that contain templates here, relative to this directory.
-if os.getenv('HUDSON_PUBLISH_DOCS'):
-    templates_path = ['_ga', '_templates']
-else:
-    templates_path = ['_templates']
+templates_path = []
 
 # The suffix of source filenames.
 source_suffix = '.rst'